<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
    div{
        width: 100px;
        height: 100px;
        border: 1px solid #0c0c0c;
        padding: 50px;
        margin: 100px;

    }
    </style>
   
</head>
<body>
    <!-- 
       content ,padding , border , margin

     -->
     <p>hello world</p>
     <div>div</div>
</body>
</html>